package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    /**
     * @description:删除分类前判断是否关联菜品或套餐
     * @author: yanhongwei
     * @date: 2023/5/20 11:33
     * @param: [id]
     * @return: void
     **/
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper();
        //添加查询条件,根据分类id进行查询
        queryWrapper.eq(Dish::getCategoryId,id);

        //查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
        int count1 = dishService.count(queryWrapper);

        if(count1>0){
            //与菜品关联，抛出业务异常
            throw new CustomException("当前分类与菜品关联，不能删除");
        }

        LambdaQueryWrapper<Setmeal> queryWrapper2=new LambdaQueryWrapper();
        //添加查询条件,根据分类id进行查询
        queryWrapper2.eq(Setmeal::getCategoryId,id);

        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        int count2 = setmealService.count(queryWrapper2);

        if(count2>0){
            //与套餐关联，抛出业务异常
            throw new CustomException("当前分类与套餐关联，不能删除");
        }

        //正常删除分类
        super.removeById(id);

    }
}
